https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 9ffecb10283508260936b96022d4ee43a7798b4c authored by Linus Torvalds on 27 September 2015, 11:50:08 UTC
Linux 4.3-rc3
Linux 4.3-rc3
Tip revision: 9ffecb1
clk-regmap-divider.c
/*
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/bitops.h>
#include <linux/regmap.h>
#include <linux/export.h>
#include "clk-regmap-divider.h"
static inline struct clk_regmap_div *to_clk_regmap_div(struct clk_hw *hw)
{
return container_of(to_clk_regmap(hw), struct clk_regmap_div, clkr);
}
static long div_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct clk_regmap_div *divider = to_clk_regmap_div(hw);
return divider_round_rate(hw, rate, prate, NULL, divider->width,
CLK_DIVIDER_ROUND_CLOSEST);
}
static int div_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_regmap_div *divider = to_clk_regmap_div(hw);
struct clk_regmap *clkr = ÷r->clkr;
u32 div;
div = divider_get_val(rate, parent_rate, NULL, divider->width,
CLK_DIVIDER_ROUND_CLOSEST);
return regmap_update_bits(clkr->regmap, divider->reg,
(BIT(divider->width) - 1) << divider->shift,
div << divider->shift);
}
static unsigned long div_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_regmap_div *divider = to_clk_regmap_div(hw);
struct clk_regmap *clkr = ÷r->clkr;
u32 div;
regmap_read(clkr->regmap, divider->reg, &div);
div >>= divider->shift;
div &= BIT(divider->width) - 1;
return divider_recalc_rate(hw, parent_rate, div, NULL,
CLK_DIVIDER_ROUND_CLOSEST);
}
const struct clk_ops clk_regmap_div_ops = {
.round_rate = div_round_rate,
.set_rate = div_set_rate,
.recalc_rate = div_recalc_rate,
};
EXPORT_SYMBOL_GPL(clk_regmap_div_ops);